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Abstract Sepiolite fiber-reinforced silica aerogel com-posites for thermal insulators were prepared by dispersing sepiolite fiber in silica sol, aging, solvent exchanging, and …
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The ability of Na+-, Li+-, K+-, Ca2+- and Mg2+-exchanged sepiolites and acid-activated sepiolites to remove ethylene from storage environments.
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Sepiolite, (German: "sea-"), a fibrous hydrated magnesium silicate, Mg4Si6O15(OH)2·6H2O, that is opaque and white, grey, or cream in colour. It may resemble the bones of the cuttlefish Sepia, from which the name derives. In the Black Sea region, where the light, porous clay mineral is abundant,
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of the sepiolite/silica aerogel composite involves four major steps: (1) the preparation of the silica sol, using nitric acid to prevent precipitation; (2) dispersing the surface treated sepiolite fiber in the silica sol to prepare homoge-neous sepiolite fiber suspension; (3) preparing the alcogel
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Cadmium ion (Cd2+) is one of the harmful metal ions in the wastewater and has attracted much attention for its removal. The current study proposes a low-cost adsorbent MnO2-sepiolite to capture Cd2+ from the aqueous solutions. The structure of the new MnO2-sepiolite adsorbent was characterized by using nitrogen …
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Sepiolite is a clay mineral with a hydrous magnesium silicate, it is a member of the orthorhombic crystal system. It presents a structure of needle-like particles and has talc-like layers that consist of two layers of tetrahedral silica and a central octahedral magnesium layer . As a result of its particular crystal structure, sepiolite has ...
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The width of the structural blocks and, consequently, the width of the tunnels and the channels are different in both clay minerals. The dimensions of the channels are for sepiolite 1.06 × 0.37 nm, whereas for palygorskite, they are 0.64 × 0.37 nm (Ruiz-Hitzky et al., 2004).Therefore, both are nanoporous microcrystalline solids exhibiting elevated …
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Sepiolite is a naturally occurring clay mineral of sedimentary origin. It is a nonswelling, lightweight, porous clay with a large specific surface area. Chemically, sepiolite is a hydrous magnesium silicate whose individual particles have a needle-like morphology. The high surface area and porosity of this clay account for its outstanding ...
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Abstract. This study aimed to assess the extractability of cadmium (Cd) and Cd uptake by rice after applying soil amendments of lime (Ca(OH) 2) and sepiolite.A rice (Oryza sativa) cultivation experiment was conducted in a Cd-contaminated paddy field.After applying lime, sepiolite, and a mixture of the two as soil amendments, soil pH showed a …
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The palygorskite-sepiolite group of clay minerals has a wide range of industrial applications derived mainly from its sorptive, rheological and catalytic properties which are based on the fabric, surface area, porosity, crystal morphology, structure and composition of these minerals. For assessing potential industrial uses, the mineralogical ...
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Present review critically evaluates the applications of sepiolite in contaminated soils to adsorb toxic metals with an emphasis on cadmium (Cd) and lead …
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Sepiolite (Si 12 Mg 8 O 30 (OH,F) 4].(H 2 O) 4 ·8H 2 O) is a valuable filler with an enormous capacity to be used in thermoplastic composites, substituting costly reinforcing fillers, such as graphene and CNTs. Sepiolite strengthened polymers nanocomposite materials have encouraged the field of research and ventures because …
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Sepiolite is a natural layered silicate with high absorbency. The fine, yellowish-white filler swells when water is absorbed. Downloads. Details 58945e.pdf. Technical Data Chemical description: Sepiolite, CAS No. 6, EINECS 264-465-3; Suitability: Acrylics, Ceramic, Tempera, Watercolor / Gouache;
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Three TTB sepiolite muds with different salt content in their liquid phase were formulated to determine rheological and fluid loss properties in ambient conditions.
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In this paper, a low-cost sepiolite-based adsorbent for CO 2 capture was obtained by impregnating DETA into the acid-modified sepiolite. Thermogravimetric analysis, nitrogen adsorption-desorption isotherm, Fourier transform infrared spectroscopy and X-ray diffraction were used for the characterization of the sepiolite supports before …
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The main difference among those nanocomposites is due to the sepiolite content, and thus, the isotherms corresponding to compositions with 20% w/w of sepiolite are closer to that of MCC alone. Those samples with low sepiolite loadings and prepared at applied energies of 20 kJ or higher also showed better water vapor transmission rates …
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La sépiolite est un absorbant minéral composé d'argile concassé. C'est un excellent absorbant pour éliminer les hydrocarbures accidentellement déversés. La sépiolite est utilisée la plupart du temps comme absorbant au sein de l'industrie. Il s'agit d'un absorbant granulé chimiquement inerte, non toxique et ininflammable, ce qui limite les risques …
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nevertheless, sepiolite is stable at temperatures up to 260 oC. Additionally, the basic structure of sepiolite is known to be firm in saturated saline-water phase. Turkey has the largest sepiolite clay deposits in the world; on the other hand, the usage of sepiolite clay as a drilling fluid not only in Turkey and but also in the world is ...
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Among the various clay minerals, sepiolite, which is a natural nanofibrous silicate that exhibit a poor cell toxicity, is a potential promising nanocarrier for the non-viral and stable transfer of ...
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Micropore distribution and effective size of the channels of natural sepiolite from Turkey were measured by the BET method. Before the BET measurement, the samples were treated under a water vapour atmosphere at various pressures to fill progressively the sepiolite micropores with water.
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Reviews in Mineralogy and Geochemistry (1988) 19 (1): 631–674. Article history. First Online:
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Semantic Scholar extracted view of "Sepiolite: Properties and Uses" by A. Álvarez. Skip to search form Skip to main content Skip to account menu. Semantic Scholar's Logo. Search 220,171,545 papers from all fields of science. Search. Sign In Create Free Account.
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The sepiolite raw material was purchased from the Liuyang Sepiolite Mining Industry Company of China. The support was prepared using sodium-leached sepiolite. The modification of sepiolite with sodium is expected to improve the thermal stability and cation exchange capacity of the sample, without altering the original structure of the …
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Astrra Chemicals - Offering Sepiolite Clay Powder In Chennai, Grade: INDUSTRIAL, Packaging Type: BAG at Rs 48/kilogram in Chennagiri, Tamil Nadu. Also find Clay Powder price list | ID: 7539898373
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Sepiolite is a hydrated magnesium silicate with a microfibrous morphology and a particular texture that provides a high specific surface area. Together with palygorskite, it forms the palygorskite–sepiolite series. The usual settings for sepiolite occurrences...
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On heating, sorbed water molecules are removed causing changes in the pore size distribution. In this study, the effects of thermal treatment on the pore structure of sepiolite and the acid-treated sepiolite samples were investigated. The solid density of sepiolite, measured by a He displacement technique, was 2.08 g cm-3 and total …
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The structure and properties of sepiolite are reviewed. Surface properties, such as porosity and sorption are detailed, as well as dehydration and thermal behaviour.
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The sintering activation energy of porous sepiolite ceramics was measured by step isothermal thermal expansion with a value of 791.42 kJ/mol in the range of 1000 °C to 1200 °C. ...
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Organo-mineral derivatives of sepiolite and palygorskite are of great interest to industry, because they have the surface and reactive properties of the grafted organic molecules …
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To allow the use of fibrous-like clays, as sepiolite, in different applications, their disaggregation and the formation of stable suspensions are crucial steps to enhance their performance significantly, e.g., in cellulose nanofibrils/clay composite formulations, enabling an adequate mixture of the matrix and filler individual components. Three …
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